Lift-cam attachment



' Sept. 8, 1925.

1,552,735 T. F. DUFF LIFT CAM ATTACHMENT 2 Smith-SM". 1

Filed Aug. 1924' 'r. F. DUFF LIFT CAM ATTACHMENT Filed Aug. 9, 1924 2shun-sum. 2 1

Patented Sept; 8, 1925. i i i NIT so STATES THoMAsF. DUFFQOF sPo'KANE,WASHINGTON.

' -LIFT-CAM ATTACHMENT.

.Applicationfiled August 9, 1924, Serial No. 731,129.".

To all whom it mag concern: g

Be it known that I, THOMAS F. DUFF, a citizen of the United States,residin at Spokane,.in thecounty of; Spokane and t-ate ofWashington,have invented new and useful Improvements in Lift-Cam Attachments, ofwhich the following is a specificatlon.

This invention relates to linotype machines and more particularly to ameans to securely of a-tapered pin;

and positively connect the lift camto the distributor conveyor-screw insuch a manner that the lift cam may be quickly detached or adjusted.

A further object 'isto provide a lift. cam attaching means of thecharacter specified which is of highly simplified construction,

durable in'use and cheap toinstall. on machines either during the courseof manufacture or at any time thereafter. I T

Other objects and advantages will be apparent during the course of thefollowing description.

In the drawing forming apart of this'zapplic'ation and in whichlikenumerals are employed to designate like parts throughout thesame, iFigure 1 is afragmentary elevation of a portion of the. distributingmechanism equipped with the improved liftcam. attachment; 7

1 Fig.2 is a' group perspectiveillustrating the lift cam attachment;

Fig. 3is a'fragmentary sideelevationof the distributor screw or rearscrew bar equipped with the improvement in a slightly modified form,parts'being shown in .sec-

tion

a Fig. 4 is a fragmentaryperspective illustrating that the screw baris-:quartered to providea plurality of partlyiseveredmembers which arepressed'into firm engagement with the inner wall of the'lift cam bymeans I w is an elevation of the expansible washer and the washerexpanding screw extended through thes'ame; v

. Flg. 9 is a perspectiveof the washer which is adapted to expand intoengagement with y the .wall of the openingin the lift cam.

, In the drawing the numeral 1 designates a distributor box which has achannel through which the lineof matrices Mare fed to the upper andlower distributor screws 2 and 3 P ATENT OFFICE.

as'each line comes fromthe casting mechanism. These matrices M are fedagainst shoulders it and 5 of the top and bottom rails Band '7respectivelyof the distributor box. pfiThe'distributor lift operates toraise the matrices successively into engagement with;

thefthreads of the distributor conveyor screws a matrix being. lifted ateac-hsrevolution of said screws. The distributor li-ft, as' shownembodies an arm 8 which'is pivoted-at 9 and has .a blade 10 whichengages the bottoms of the matrices successively and thereby lifts thesame into engagement with the conveyor screws. The arm 8 is operated byra lever .11, the latter being provided: with a roller 12.

Fig. 1 plainly illustrates that the roller 12 vis engaged with thesurface of a disk shaped cam 13, the cam being provided with a recess14: by' means, of which the roller 12 is permitted to'move inwardly at.regular inter- .vals and thereby bring about the operation of the -arm8and associated mechanism.

. 1 The invention'forminglthe subject matter of this-application residesin the means for securing the lift cam 13. and more particularlytheattaching sleeve 15 of the same on theprojection. 16 of thescrew bar 2..F ig. '2 plainly illustrates" that (the projection 16 is formed.withaplurality ofincisions 18 which define segmental portionsl19.adaptedtolbe received in the-sleeve 15..{1110 segmental, portions .19are freelyireceivedin the attachingsleeve 15 and are subsequentlyengaged by the wedge 22 by means of which the segmental portions 19 aresecurely and posi- -tively engaged with the inner wall of the sleeve 15.I

The wedge 22 is inthe nature of a flat strip of metal having laterallydirected wings, 25 and the forward. portion of the strip of metal andthe Wings 25 are adapted to fit in the spaces between the-segmentalportions'19 and therebyv support the segmental portions' outwardly intofirm frictional contact with the wall of the sleeve 15.

This positively anchors cam 13 on the pro-' 'sired to renew or r I j p Mcam The tool 36 may be fulcrumed on j ection 16 and overcomes thenecessity of employing separate fastening pins or keys.

The particular means illustrated for securing the cam 13 on theprojection 16 permits the cam to be quickly detached for re placement orfor readjustment when desired, It is merely necessary to engage theextended rear end of the wedge 22 with a suitable tool and forciblydetach the same. It will be seen that the extension on the rear end ofthe wedge is provided with an aperture 26 for the engagement of a smallpunch or the like by means of which the wedge may be quickly andforcibly withdrawn. When the wedge 22 is withdrawn from engagement withthe projection 16 the cam 13 may be either replaced or adjustedcircumferentially on the projection 16 to compensate for wear andtherebyretime the mechanism. In the form of the invention illustrated in Figs.3, 4 and 5 the screw bar is indicated by the numeral 30 and is providedwith a projection 31 to Which the sleeve 32 of the lift cam 33 isadapted to be adjustably connected. N

Fig. 3 illustrates that, the cam 33 is located somewhat beyond thequartered end of the projection 31 and a tapered pin 35 is adapted to bewedged between the quartered end of the projection so as to spread thesegmental portions of the projection into firm engagement with thesleeve 32 so as to hold the sleeve in position.

A tool 36 is provided at itsforward end with a forked portion37 whichmay be engaged with the head 38 of the pin 35 'as to forciblywithdrawthe same when it is dechange the position of the the cam 33 whenthe forward end 37 is en gaged with the head 38. In use the 35 may behammered or otherwise forcedinto the space between the armsger thequartered forward end of the projection 31.

In the form of the invention illustrated in Figs. 6, 7, 8 and 9 thescrew bar is indicated by the numeral 45 and the cam is designated bythe numeral 46.- Figs. 6 and 7 plainly illustrate that the cam 46 isprovided with an attaching sleeve 47 designed to be secured upon theprojecting end portions 48 ofthe screw bar 45-. The projection- 4:8 orextension 48 as the same may be said to be is provided with a threadedsocket 50 for the reception of a fastening screw 51. Fig. 7 illustratesthat the attaching screw 51 is provided with a cone shaped head 52adapted to be eXtended into the cone shaped bore of an extensible washer53. The washer 53 is radially split and consequently when the screw 51is advanced the washer is forced into firm engagement with the innerwall of the sleeve 47. It will be seen that the cone shaped head 52 hasthreaded engagement with the radially split extensible washer.

In the use of this form of the invention the sleeve 17 ismounted on theprojection 48 and when the fastener 51 is threaded through the splitwasher 53 andinto the 'jjrojeetion48 the washer is firmly wedged intoengagement with the wall of the sleeve 47. This securely and positivelyholds the parts in position and at the same time permits the same to bequickly removed when it is desired to change the position of the cam orto renew the cam.-

Having thus described what is claimed is:

1. In a linotype machine, the combinatien of a screw bar having one endprovided with longitudinal incisions defining segmental portions, of acam having a sleeve mounted on said screw bar and surrounding saidsegmental portions, and a wedge having a plurality of wings adapted tobe positioned bethe invention,

tween the opposed sides of said segmental portions to move the segmentalportions out.

wardly into engagement with the wall oftll'e sleeve to form the solemeans for securing the -cam on the screw bar. 7

2. In a linotype machine, the combination of a screw bar having one endprovided With longitudinal incisions defining segmental portions, of acam having a sleeve mounted on said screw bar and surrounding saidsegmental portions, and a wedge having a plurality of wings adaptedto'be positioned be tween the opposed sides of said segmental portionsto move the segmental portions outwardly into engagement with the wallof the sleeve .to formthe' sole means for securing the cam on the screwbar, said wedge having a rearwardly projected apertured extension forengagement by a tool. I

In testimony whereof I signature.

THOMAS F. DUFF.

